65 million years ago, the knights of the Ryusoul Tribe were selected to participate in a war campaign against the dictating Druidon Tribe who ruled Earth. But their war campaign was halted by the meteor that brought the age of the dinosaurs to an end, forcing the Druidon to flee into space. Meanwhile, the Kishiryu placed in a deep sleep as a failsafe should the Druidon return, the chosen knights choose to live in peace while placing their mantle to the next generation. In the present day, the Druidon return to reclaim Earth as the current knights, the Ryusoulgers, battle them with the support of Ui Tatsui and her father Naohisa Tatsui.